Bump mypy from 1.8.0 to 1.9.0

Bumps [mypy](https://github.com/python/mypy) from 1.8.0 to 1.9.0.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.8.0...1.9.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements/dev.txt

@@ -4,7 +4,7 @@ black==24.2.0
 ruff
 isort==5.13.2;python_version>"3.7"
 isort<5.12.0;python_version<="3.7"
-mypy==1.8.0; implementation_name!='pypy'
+mypy==1.9.0; implementation_name!='pypy'
 redis>=4.2.0
 twine
 types-deprecated